Slag modifier for converter refining

A converter refining and slag-adjusting agent technology is applied in the field of steel-making and slag-making technology, which can solve the problems of poor ability of primary slag to absorb inclusions, improve the erosion ability of ladle refractories, and adversely affect the purity of molten steel, so as to reduce slag formation. time, improving the quality of finished steel products, and the effect of improving the overall quality

Inactive Publication Date: 2011-04-06
HUNAN VALIN XIANGTAN IRON & STEEL CO LTD
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Problems solved by technology

The prior art mainly has the following disadvantages: first, the cost is high, and the amount of deoxidizer is relatively large; second, the primary slag formed after adding is relatively high in oxidation, which is not conducive to the improvement of the purity of molten steel and the impact on ladle refractory materials. It has a greater erosion ability; third, the ability of primary slag to absorb inclusions is not very strong

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  • Slag modifier for converter refining
  • Slag modifier for converter refining

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Embodiment Construction

[0010] The slagging agent for converter refining, its composition mass percentage (%) is: CaO = 0 ~ 6.0, Al 2 o 3 = 48~58, SiO 2 =0~12, Al=20~25, and the balance is unavoidable impurities.

[0011] Preparation method: first grind the bauxite into powder and mix it with aluminum chips, then add an appropriate amount of ordinary binder and mix well, use a special machine to briquetting it into a ball, and then bake the briquette to reduce the briquette. The water content increases the strength of the briquette.

[0012] Specific usage method: put the slag adjusting agent into the high-level bunker on the top of the converter, add the alloy into the ladle through the feeding system during the tapping process, and form the primary refining slag in the ladle after tapping, enter the ladle refining furnace and press Adding lime and slagging agent in a certain proportion can quickly form refining slag with good fluidity and strong desulfurization ability. See Table 1 and Table 2...

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Abstract

The invention relates to a slag modifier for converter refining, which comprises the following components by mass percentage: 0-6.0 of CaO, 48-58 of Al2O3, 0-12 of SiO2, 20-25 of Al, and the balance of inevitable impurities. By adding the slag modifier in the processes of tapping, refining and slagging of a converter, the deoxidation cost in the steel making process can be reduced, the desulfurization degree of steel water in the tapping process of the converter can be increased, the slagging time of white line slag refined by a ladle furnace can be shortened, the refining effect can be improved, the oxidizability of refined early slag can be reduced, and the purity of the steel water can be enhanced.

Description

technical field [0001] The invention relates to a steelmaking slagging process, in particular to a slagging agent for converter refining. technical background [0002] All steel mills are striving to establish an efficient and low-cost clean steel production platform. Adding slagging agent to molten steel during tapping is one of the effective means of clean steel production. In the converter process, lime and slag adjusting agent are added to the steel during the tapping of molten steel in order to obtain a suitable primary slag before the molten steel enters the refining process. [0003] The material used in the post-refining process of conventional converter steelmaking is deoxidizer plus refining slag, but the amount of final converter slag entering the ladle due to tapping slag is relatively large and has high oxidation, which destroys the original composition of refining slag and weakens the refining slag. Various molten steel purification indicators. The prior art...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/36C21C7/076
CPCY02P10/20
Inventor 罗登杨建华陈卫金刘丹肖大恒王建国
Owner HUNAN VALIN XIANGTAN IRON & STEEL CO LTD
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